Development and characterization of new AZ41 and AZ51 magnesium alloys

Abstract

In the present study, new AZ41 and AZ51 magnesium alloys were successfully synthesized by adding 1 wt. % and 2 wt. % aluminum into AZ31B matrix, respectively, using an innovative disintegrated melt deposition technique followed by hot extrusion. Microstructural characterization studies revealed equiaxed grain morphology, reasonably uniform distribution of intermetallics in the matrix and minimal porosity. Physical properties characterization revealed that addition of Al reduced the coefficient of thermal expansion (CTE) of monolithic AZ31B. The presence of higher percentage of aluminum also assisted in improving overall mechanical properties including microhardness, modulus of elasticity, 0.2% yield strength, ultimate tensile strength, and work of fracture of AZ31. The results suggest that these newly developed AZ magnesium alloys have significant potential in diverse engineering applications when compared to AZ31 alloy.